Claude Fable produced a counterexample to the Jacobian Conjecture
A mathematician named Fable has reportedly produced a counterexample to the Jacobian Conjecture, a long-standing problem in algebraic geometry. The finding was shared via social media and involves a specific polynomial mapping in three dimensions.
levent @__alpoge__ 1h hello there the jacobian conjecture is false thanx to my close friend akhil for asking about it and my other close friend fable for working during the world cup final ((1+xy)^3 z + y^2 (1+xy) (4+3xy), y + 3 x (1+xy)^2 z + 3 x y^2 (4+3xy), 2 x - 3 x^2 y - x^3 z): \C^3\to \C^3, has jacobian determinant -2, and sends (0, 0, -1/4), (1, -3/2, 13/2), and (-1, 3/2, 13/2) to (-1/4, 0, 0) Jul 20, 2026 · 2:19 AM UTC
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